[Rivet] Proposals for make-plots

[Frank Siegert]

Hi Riveters,

I have a couple of local modifications that I have been carrying in my 
make-plots for a while and was wondering whether you would consider them 
useful to commit:

1. If bin sizes are increasing along the x axis, then use LogX=1.
Rationale: I often write a quick MC analysis and don't want to bother 
with setting all the plotting options. That's fine for x/y-labels and 
title, since I can guess them from the histo name. But for 
logarithmically binned x axes the histogram becomes not very nice to 
look at with LogX=0.

2. The dimensions of the .png files have recently been increased quite a 
bit by changing density=100 -> density=120 (in r2775). I don't care 
about the --png option, but for --pdfpng I would like to decrease them 
at least back to the original value, if not even further (e.g. back to 
the default of 72).
Rationale: For plotting on webpages the PNG's are only some kind of 
largish thumbnails and it is nice to be able to fit as many of them on 
the screen as possible for quick glancing over the results. If one wants 
to look into more detail, one can simply click on the plot which will 
open the fully-scalable PDF file.

Any objections?

Cheers,
Frank